A fluorescent probe for detecting heavy metal ions in industrial wastewater and its preparation method

A technology for heavy metal ions and industrial wastewater, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of detection work, quenching of fluorescent probes, etc., to avoid self-quenching phenomenon, fluorescence intensity increase. The effect of large and efficient fluorescence emission

Active Publication Date: 2021-12-14
徐从燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many reports on the use of fluorescent probes to detect heavy metals, but most of them are small molecular structures. These compounds emit fluorescence due to the existence of π-π conjugation. Quenching occurred, which caused great trouble to the detection work

Method used

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  • A fluorescent probe for detecting heavy metal ions in industrial wastewater and its preparation method
  • A fluorescent probe for detecting heavy metal ions in industrial wastewater and its preparation method
  • A fluorescent probe for detecting heavy metal ions in industrial wastewater and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Dissolve indole-3-carbaldehyde in a solvent, put potassium carbonate into the above mixture, stir at room temperature for 10 minutes, then add 1,2,4,5-tetrafluorobenzene, and keep at 55°C, keep warm Reacted for 120min, and after the reaction was completed, compound I was obtained through purification;

[0030] 2) Take the compound I prepared in step 1), dissolve the compound I in THF, add glacial acetic acid, stir at room temperature for 15 minutes, then add p-phenylenediamine, reflux for 24 hours, remove the solvent by rotary evaporation, and purify by recrystallization Polymer II is obtained.

[0031] In the described step 1), the solvent is selected from one of methanol, ethanol or THF;

[0032] In the step 1), the dosage ratio of indole-3-carbaldehyde to 1,2,4,5-tetrafluorobenzene is 5:1;

[0033] In described step 1), the consumption ratio of potassium carbonate and indole-3-carbaldehyde is 0.01:1;

[0034] In the step 1), the purification treatment step is s...

Embodiment 2

[0042] 1) Dissolve indole-3-carbaldehyde in a solvent, put potassium carbonate into the above mixture, stir at room temperature for 20 minutes, then add 1,2,4,5-tetrafluorobenzene, and keep at 85°C, keep warm Reacted for 120min, and after the reaction was completed, compound I was obtained through purification;

[0043] 2) Take the compound I prepared in step 1), dissolve the compound I in THF, add glacial acetic acid, stir at room temperature for 10 min, then add p-phenylenediamine, reflux for 8 h, remove the solvent by rotary evaporation, and purify by recrystallization Polymer II is obtained.

[0044] In the described step 1), the solvent is selected from one of methanol, ethanol or THF;

[0045] In the step 1), the dosage ratio of indole-3-carbaldehyde to 1,2,4,5-tetrafluorobenzene is 8:1;

[0046] In described step 1), the consumption ratio of potassium carbonate and indole-3-carbaldehyde is 0.03:1;

[0047] In the step 1), the purification treatment step is specifical...

Embodiment 3

[0051] 1) Dissolve indole-3-carbaldehyde in the solvent, put potassium carbonate into the above mixture, stir at room temperature for 15 minutes, then add 1,2,4,5-tetrafluorobenzene, and keep at 65°C, keep warm After reacting for 100min, after the reaction was completed, compound I was obtained through purification;

[0052] 2) Take the compound I prepared in step 1), dissolve the compound I in THF, add glacial acetic acid, stir at room temperature for 12 minutes, then add p-phenylenediamine, reflux for 12 hours, remove the solvent by rotary evaporation, and purify by recrystallization Polymer II is obtained.

[0053] In the described step 1), the solvent is selected from one of methanol, ethanol or THF;

[0054] In the step 1), the dosage ratio of indole-3-carbaldehyde to 1,2,4,5-tetrafluorobenzene is 6:1;

[0055] In described step 1), the consumption ratio of potassium carbonate and indole-3-carbaldehyde is 0.02:1;

[0056] In the step 1), the purification treatment step...

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Abstract

The application belongs to the field of chemical industry, and specifically relates to a fluorescent probe for detecting heavy metal ions in industrial wastewater and a preparation method thereof. Utilizing the dispersed "branched structure" of 1,2,4,5-tetrafluorobenzene, the polymer II has a hyperbranched structure, which effectively avoids the self-quenching phenomenon caused by π-π stacking, making the fluorescent probe After the needle is combined with heavy metal ions, it emits fluorescence more efficiently, so it has the basic conditions for being a fluorescent probe for heavy metal ions. In addition, the special C=N structure of the Schiff base enables it to complex with positively charged metal ions. After complexation, the conjugation plane is further increased, which increases the fluorescence intensity, thereby detecting the presence of heavy metal ions. .

Description

technical field [0001] The application belongs to the field of chemical industry, and specifically relates to a fluorescent probe for detecting heavy metal ions in industrial wastewater and a preparation method thereof. Background technique [0002] Heavy metals originally refer to metals with a specific gravity greater than 5 (metals with a density greater than 4.5 grams per cubic centimeter), including gold, silver, copper, iron, lead, etc. Heavy metal pollution is different from pollution from other organic compounds. Many organic compounds can reduce or eliminate their harmfulness through physical, chemical or biological purification of nature itself. Heavy metals are enriched and difficult to degrade in the environment. However, heavy metal pollution is particularly prominent in water pollution. Heavy metal ions will irrigate the fields with sewage, and heavy metals will be enriched in food, thereby entering the human body and causing serious harm to the human body. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/08C09K11/06G01N21/64
CPCC08G12/08C09K11/06G01N21/643C09K2211/1466
Inventor 徐从燕姚斌祁海平蔡元庚
Owner 徐从燕
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